<?php
/**
 *
 * 封装XML与Json数据输出方法
 *
 */

class DCXmlOrJson{
	const JSON = 'json';


	public static function show($code,$message = '',$data = array(),$type = self::JSON){
		if (!is_numeric($code)) {
			return '';
		}

		$type = isset($_GET['format']) ? $_GET['format'] : self::JSON;

		$result = array(
			'code' => $code,
			'message' => $message,
			'data' => $data
		);

		if ($type == 'json') {
			self::jsonEcode($code,$message,$data);
			exit;
		}elseif ($type == 'array') {
			var_dump($result);
		}elseif ($type == 'xml') {
			self::xmlEncode($code,$message,$data);
			exit;
		}else{
			//TODO
		}
	}

	//按json方式输出通信数据
	public static function jsonEcode($code,$message='',$data=array()){
		if (!is_numeric($code)) {
			return '';
		}

		$result = array(
			'code' => $code,
			'message' => $message,
			'data' => $data
		);

		echo json_encode($result);
		exit;
	}

	//按xml方式输出通信数据
	public static function xmlEncode($code,$message,$data=array()){
		if (!is_numeric($code)) {
			return '';
		}

		$result = array(
			'code' => $code,
			'message' => $message,
			'data' => $data
		);

		header("Content-Type:text/xml");
		$xml = "<?xml version='1.0' encoding='UTF-8'?>\n";
		$xml .= "<root>\n";

		$xml .= self::xmlToEncode($result);

		$xml .= "</root>";

		echo $xml;
	}


	public static function xmlToEncode($data){
		$xml = $attr ="";
		foreach ($data as $key => $value) {
			if (is_numeric($key)) {
				$attr = "id='{$key}'";
				$key = "item";
			}
			$xml .= "<{$key} {$attr}>";
			$xml .= is_array($value) ? self::xmlToEncode($value) : $value;
			$xml .= "</{$key}>\n";
		}
		return $xml;
	}
}